1920880 has 40 divisors (see below), whose sum is σ = 4812192. Its totient is φ = 708864.

The previous prime is 1920859. The next prime is 1920883. The reversal of 1920880 is 880291.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117 + ... + 1963.

2^1920880 is an apocalyptic number.

1920880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1920880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2406096).

1920880 is an abundant number, since it is smaller than the sum of its proper divisors (2891312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1920880 is a wasteful number, since it uses less digits than its factorization.

1920880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873 (or 1867 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 1920880 is about 1385.9581523264. The cubic root of 1920880 is about 124.3082859809.

The spelling of 1920880 in words is "one million, nine hundred twenty thousand, eight hundred eighty".